1 files changed, 83 insertions, 0 deletions
diff --git a/include/asm-powerpc/iseries/lpar_map.h b/include/asm-powerpc/iseries/lpar_map.h
new file mode 100644
index 00000000000..a6840b186d0
--- /dev/null
+++ b/include/asm-powerpc/iseries/lpar_map.h
@@ -0,0 +1,83 @@
+/*
+ * LparMap.h
+ * Copyright (C) 2001  Mike Corrigan IBM Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ */
+#ifndef _LPARMAP_H
+#define _LPARMAP_H
+
+#ifndef __ASSEMBLY__
+
+#include <asm/types.h>
+
+/*
+ * The iSeries hypervisor will set up mapping for one or more
+ * ESID/VSID pairs (in SLB/segment registers) and will set up
+ * mappings of one or more ranges of pages to VAs.
+ * We will have the hypervisor set up the ESID->VSID mapping
+ * for the four kernel segments (C-F).  With shared processors,
+ * the hypervisor will clear all segment registers and reload
+ * these four whenever the processor is switched from one
+ * partition to another.
+ */
+
+/* The Vsid and Esid identified below will be used by the hypervisor
+ * to set up a memory mapping for part of the load area before giving
+ * control to the Linux kernel.  The load area is 64 MB, but this must
+ * not attempt to map the whole load area.  The Hashed Page Table may
+ * need to be located within the load area (if the total partition size
+ * is 64 MB), but cannot be mapped.  Typically, this should specify
+ * to map half (32 MB) of the load area.
+ *
+ * The hypervisor will set up page table entries for the number of
+ * pages specified.
+ *
+ * In 32-bit mode, the hypervisor will load all four of the
+ * segment registers (identified by the low-order four bits of the
+ * Esid field.  In 64-bit mode, the hypervisor will load one SLB
+ * entry to map the Esid to the Vsid.
+*/
+
+#define HvEsidsToMap	2
+#define HvRangesToMap	1
+
+/* Hypervisor initially maps 32MB of the load area */
+#define HvPagesToMap	8192
+
+struct LparMap {
+	u64	xNumberEsids;	// Number of ESID/VSID pairs
+	u64	xNumberRanges;	// Number of VA ranges to map
+	u64	xSegmentTableOffs; // Page number within load area of seg table
+	u64	xRsvd[5];
+	struct {
+		u64	xKernelEsid;	// Esid used to map kernel load
+		u64	xKernelVsid;	// Vsid used to map kernel load
+	} xEsids[HvEsidsToMap];
+	struct {
+		u64	xPages;		// Number of pages to be mapped
+		u64	xOffset;	// Offset from start of load area
+		u64	xVPN;		// Virtual Page Number
+	} xRanges[HvRangesToMap];
+};
+
+extern const struct LparMap	xLparMap;
+
+#endif /* __ASSEMBLY__ */
+
+/* the fixed address where the LparMap exists */
+#define LPARMAP_PHYS		0x7000
+
+#endif /* _LPARMAP_H */